{"id":1502,"date":"2020-10-27T14:38:25","date_gmt":"2020-10-27T03:38:25","guid":{"rendered":"https:\/\/superiorhdd.com.au\/?p=1502"},"modified":"2024-08-13T16:59:25","modified_gmt":"2024-08-13T06:59:25","slug":"superior-hdd-completes-4-x-hdd-ocean-outfalls-in-sydneys-northern-beaches","status":"publish","type":"post","link":"https:\/\/superiorhdd.com.au\/index.php\/2020\/10\/27\/superior-hdd-completes-4-x-hdd-ocean-outfalls-in-sydneys-northern-beaches\/","title":{"rendered":"4 x HDD Ocean Outfalls in Sydney\u2019s Northern Beaches"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"1502\" class=\"elementor elementor-1502\" data-elementor-post-type=\"post\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4a991c4c elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4a991c4c\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-76de94b6\" data-id=\"76de94b6\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-f09524c elementor-widget elementor-widget-video\" data-id=\"f09524c\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/youtu.be\\\/5WPgAF-UAeg?si=MlgQC0jyncClKIhe&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ce58b47 elementor-widget elementor-widget-text-editor\" data-id=\"ce58b47\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h2 style=\"text-align: left;\">Hard conditions, detailed approach: making connections in the Northern Beaches<\/h2><p style=\"text-align: left;\">Steep, rocky, and accessible only by water, many parts of the Northern Beaches are as secluded as they are beautiful. But with the Mona Vale area earmarked for a new NBN connection, a thoughtful and well-planned HDD approach was required to ensure Northern Beaches locals will be even better connected.<br \/>Too isolated for large populations, and with ground conditions too hard for farming, the Northern Beaches\u2019 natural beauty has endured. With many locals living amongst the secluded beaches and national park areas, with modern times have come modern demands, including rollout of the NBN to the area via the Mona Vale Western Bay NBN Outfalls. Thus, the challenge was presented: how best to install this vital infrastructure in such an inaccessible, environmentally sensitive location, with rock conditions?<\/p><h3 style=\"text-align: left;\">Strict environmental requirements<\/h3><p style=\"text-align: left;\">The project was bound from the start by rigorous environmental conditions. With much of the location covered by Ku-ring-gai Chase National Park, a trenchless solution was non-negotiable in order to minimise environmental impact. Central Coast-based HDD specialists Superior HDD were engaged by Downer to complete the 4 x HDD ocean outfall connections of the HDPE pipes.<\/p><p style=\"text-align: left;\">Superior HDD Managing Director and Operations Manager, James Burch, recognised the project\u2019s challenges immediately. \u201cThis is a very sensitive national park area, with many parts only accessible by water,\u201d he said. \u201cHDD was the only way to do it, and we knew with good planning, design, and risk mitigation, we would get it done right.\u201d<\/p><p style=\"text-align: left;\">\u00a0<\/p><p style=\"text-align: left;\"><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-1503 size-full alignleft\" src=\"https:\/\/superiorhdd.com.au\/wp-content\/uploads\/2020\/10\/strict-envirnment.jpg\" alt=\"\" width=\"609\" height=\"345\" srcset=\"https:\/\/superiorhdd.com.au\/wp-content\/uploads\/2020\/10\/strict-envirnment.jpg 609w, https:\/\/superiorhdd.com.au\/wp-content\/uploads\/2020\/10\/strict-envirnment-300x170.jpg 300w, https:\/\/superiorhdd.com.au\/wp-content\/uploads\/2020\/10\/strict-envirnment-200x113.jpg 200w, https:\/\/superiorhdd.com.au\/wp-content\/uploads\/2020\/10\/strict-envirnment-400x227.jpg 400w, https:\/\/superiorhdd.com.au\/wp-content\/uploads\/2020\/10\/strict-envirnment-600x340.jpg 600w\" sizes=\"(max-width: 609px) 100vw, 609px\" \/><\/p><h2 style=\"text-align: left;\">\u00a0<\/h2><h3>\u00a0<\/h3><h3>\u00a0<\/h3><h3>\u00a0<\/h3><h3>\u00a0<\/h3><h3>\u00a0<\/h3><h3>\u00a0<\/h3><h3>\u00a0<\/h3><h3 style=\"text-align: left;\">Minimising risk<\/h3><p style=\"text-align: left;\">James explained that his priority was first to fully understand the project\u2019s risks in detail. \u201cWe know the ground conditions in this area very well, and while the consistent Hawkesbury sandstone provides hard but predictable drilling conditions, being such a sensitive area, hydrofracture was not an option,\u201d he said. \u201cSo we had our HDD design specialists complete a detailed profile and alignment and hydrofracture assessment, coming up with an ultraconservative, deep profile to minimise frac-out from that perspective,\u201d he said.<\/p><p style=\"text-align: left;\">From there, drilling fluid was the next step. \u201cWe needed bentonite to ensure optimal borehole performance and cuttings removal, but we couldn\u2019t risk release of this fluid into the surrounding waters,\u201d James said. \u201cSo we devised a detailed drilling fluid plan which used a bentonite program for most of the initial pilot, then a complete displacement of the hole, replacing all fluid with an environmentally low-impact xanthan gum mix,\u201d he said. \u201cThis allowed us to punch out using the biodegradable xanthan gum fluid, as well as to responsibly plan, monitor, and analyse our returns for the entirety of the bores.\u201d<\/p><p style=\"text-align: left;\">\u00a0<\/p><p style=\"text-align: left;\"><img decoding=\"async\" class=\"wp-image-1505 size-full alignleft\" src=\"https:\/\/superiorhdd.com.au\/wp-content\/uploads\/2020\/10\/picture-2.jpg\" alt=\"\" width=\"574\" height=\"325\" srcset=\"https:\/\/superiorhdd.com.au\/wp-content\/uploads\/2020\/10\/picture-2.jpg 574w, https:\/\/superiorhdd.com.au\/wp-content\/uploads\/2020\/10\/picture-2-300x170.jpg 300w, https:\/\/superiorhdd.com.au\/wp-content\/uploads\/2020\/10\/picture-2-200x113.jpg 200w, https:\/\/superiorhdd.com.au\/wp-content\/uploads\/2020\/10\/picture-2-400x226.jpg 400w\" sizes=\"(max-width: 574px) 100vw, 574px\" \/><\/p><h2 style=\"text-align: left;\">\u00a0<\/h2><h3 style=\"text-align: left;\">\u00a0<\/h3><h3 style=\"text-align: left;\">\u00a0<\/h3><h3 style=\"text-align: left;\">\u00a0<\/h3><h3 style=\"text-align: left;\">\u00a0<\/h3><h3 style=\"text-align: left;\">\u00a0<\/h3><h3 style=\"text-align: left;\">\u00a0<\/h3><h3 style=\"text-align: left;\">Practical implications<\/h3><p style=\"text-align: left;\">Mobilising their Ditch Witch JT60 All Terrain midi rig and support equipment to the isolated sites also required many practical adaptations. \u201cMany of the project areas are accessible only by water, and being ocean outfalls, much of our support equipment was transported and set up on barges for the duration of the project,\u201d James said. Along with limited accessibility, the steep and rocky environment added additional challenges. \u201cFor more than one crossing, there was a 50m elevation difference between the drill site and the mud recycling system on the barge,\u201d James said. \u201cWe rose to this challenge by supplying top of the range, powerful transfer pumps, as well as extensive auxiliary equipment to minimise possible interruptions.\u201d<\/p><h3 style=\"text-align: left;\">Community and National Parks engagement<\/h3><p style=\"text-align: left;\">James explained that the project required involvement of a range of stakeholders, and that Superior HDD seized the opportunity to demonstrate the strengths of HDD. \u201cWe had eyes on us for the whole project. In such a pristine environment, the local community was very environmentally conscious,\u201d he said. \u201cBut we consulted closely and regularly with stakeholders to ensure we were fully across all environmental requirements, and to put concerned locals\u2019 minds at ease. We also don\u2019t rely on subcontractors for any of our HDD equipment, so we were able to personally consult with major stakeholders like National Parks, and then directly supply all gear in compliance with their strict requirements, including tracked machinery only.\u201d<\/p><p style=\"text-align: left;\">\u00a0<\/p><p style=\"text-align: left;\"><img decoding=\"async\" class=\"size-full wp-image-1504 alignleft\" src=\"https:\/\/superiorhdd.com.au\/wp-content\/uploads\/2020\/10\/picture-3.jpg\" alt=\"\" width=\"393\" height=\"473\" srcset=\"https:\/\/superiorhdd.com.au\/wp-content\/uploads\/2020\/10\/picture-3.jpg 393w, https:\/\/superiorhdd.com.au\/wp-content\/uploads\/2020\/10\/picture-3-249x300.jpg 249w, https:\/\/superiorhdd.com.au\/wp-content\/uploads\/2020\/10\/picture-3-200x241.jpg 200w\" sizes=\"(max-width: 393px) 100vw, 393px\" \/><\/p><p style=\"text-align: left;\">\u00a0<\/p><h3 style=\"text-align: left;\">\u00a0<\/h3><h3 style=\"text-align: left;\">Successful Connections<\/h3><p style=\"text-align: left;\">The final of the four connections was completed in late September, on budget and within required timelines. \u201cWe were proud to showcase the accuracy and environmental benefits of HDD with this project, proving that with good preparation and risk mitigation, it\u2019s a safe, responsible method in even the most pristine environments.\u201d<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Superior HDD completes 4 x HDD Ocean Outfalls in Sydney\u2019s Northern Beaches<\/p>\n","protected":false},"author":1,"featured_media":1505,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49],"tags":[],"class_list":["post-1502","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-recent-work"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - 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